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package FB3::Validator; |
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3
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=head1 NAME |
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FB3::Validator - check file to be a valid FB3 book |
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7
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=head1 SYNOPSIS |
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my $Validator = FB3::Validator->new; |
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if( my $ValidationError = $Validator->Validate( "path/to/book.fb3" )) { |
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die "path/to/book.fb3 is not a valid FB3: $ValidationError"; |
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} |
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=cut |
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1357
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use strict; |
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29
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use OPC; |
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1
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use XML::LibXML; |
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1
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151
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use FB3; |
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2
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1
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34
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our $XSD_DIR; |
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use constant { |
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1
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66
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RELATION_TYPE_CORE_PROPERTIES => |
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'http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties', |
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RELATION_TYPE_FB3_BOOK => |
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'http://www.fictionbook.org/FictionBook3/relationships/Book', |
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RELATION_TYPE_FB3_BODY => |
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'http://www.fictionbook.org/FictionBook3/relationships/body', |
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1
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}; |
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31
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32
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use constant { |
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1
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1311
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CORE_PROPERTIES_CT => 'application/vnd.openxmlformats-package.core-properties+xml', |
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RELATIONSHIPS_CT => 'application/vnd.openxmlformats-package.relationships+xml', |
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1
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1
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}; |
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1
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36
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37
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sub new { |
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my( $class, $XSD_DIR ) = @_; |
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$XSD_DIR //= FB3::SchemasDirPath(); # in development purposes it maybe |
40
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# convenient to use some other schemas path |
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42
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0
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my $Validator = { |
43
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xsd_dir => $XSD_DIR, |
44
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}; |
45
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46
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0
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bless $Validator, $class; |
47
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48
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0
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return $Validator; |
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} |
50
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51
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# Возвращает пустую строку в случае успеха, иначе - текст ошибки |
52
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sub Validate { |
53
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0
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0
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0
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my( $self, $FileName ) = @_; |
54
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55
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0
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my $XSD_DIR = $self->{xsd_dir}; |
56
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57
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# Проверка, что файл - валидный ZIP архив |
58
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59
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0
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my $Package = eval{ OPC->new( $FileName ) }; |
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0
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60
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0
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0
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return $@ if( $@ ); |
61
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62
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0
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my %Namespaces = ( |
63
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opcr => 'http://schemas.openxmlformats.org/package/2006/relationships', |
64
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); |
65
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0
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my $XPC = XML::LibXML::XPathContext->new(); |
66
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0
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$XPC->registerNs( $_ => $Namespaces{$_} ) for keys %Namespaces; |
67
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68
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# Находим Content Types Stream, проверяем валидность |
69
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70
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0
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my $CtXML = $Package->GetContentTypesXML; |
71
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0
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0
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unless( $CtXML ) { |
72
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0
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return "Content Types part not found"; |
73
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} |
74
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0
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my $CtSchema = XML::LibXML::Schema->new( location => |
75
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"$XSD_DIR/opc-contentTypes.xsd" ); |
76
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0
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my $CtDoc; |
77
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0
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eval { |
78
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0
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$CtDoc = XML::LibXML->new()->parse_string( $CtXML ); |
79
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0
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$CtSchema->validate( $CtDoc ); |
80
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}; |
81
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0
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0
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if( $@ ) { |
82
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0
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return "Content Types part contains invalid XML or is invalid against ". |
83
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"XSD schema:\n$@"; |
84
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} |
85
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86
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# Находим все части, описывающие связи (Relationships). |
87
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88
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0
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my @ValidPartNames = grep IsValidPartName($_), $Package->PartNames; |
89
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90
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0
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my @RelsPartNames; |
91
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0
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for my $PartName ( @ValidPartNames ) { |
92
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0
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my( $SourceDir, $SourceFileName ) = _SourceByRelsPartName( $PartName ); |
93
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0
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0
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0
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if( defined $SourceDir && defined $SourceFileName ) { |
94
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0
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my $SourcePartName = $SourceDir.$SourceFileName; |
95
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96
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0
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0
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0
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if( $SourcePartName eq "/" # источник - сам архив |
97
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|| grep $SourcePartName eq $_, @ValidPartNames # источник есть в архиве |
98
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) { |
99
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100
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0
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0
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push @RelsPartNames, $PartName unless grep $PartName eq $_, @RelsPartNames; |
101
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} |
102
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} |
103
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} |
104
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105
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# Проверки частей, описывающих связи |
106
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107
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0
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my $PackageRelsDoc; # заодно находим часть с Package Relationships |
108
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my @PartNames; # заодно собираем названия всех частей, связи с которыми прописаны |
109
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110
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0
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my $RelsSchema = XML::LibXML::Schema->new( location => "$XSD_DIR/opc-relationships.xsd" ); |
111
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112
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0
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for my $RelsPartName ( @RelsPartNames ) { |
113
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114
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# Проверка части на соответствие opc-relationships.xsd |
115
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116
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0
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my $RelsDoc; |
117
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0
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my $RelsPartXML = $Package->PartContents( $RelsPartName ); |
118
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0
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eval { |
119
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0
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$RelsDoc = XML::LibXML->new()->parse_string( $RelsPartXML ); |
120
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0
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$RelsSchema->validate( $RelsDoc ); |
121
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}; |
122
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0
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0
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if( $@ ) { |
123
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0
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return $RelsPartName." is not a valid XML or is not valid against ". |
124
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"opc-relationships.xsd:\n$@"; |
125
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} |
126
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127
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# У Relationships частей должен быть соответствующий Content Type |
128
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129
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0
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0
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unless( $Package->PartContentType( $RelsPartName ) eq RELATIONSHIPS_CT ) { |
130
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0
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return "Wrong content type for $RelsPartName (OPC M1.30 violation)" |
131
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} |
132
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133
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# Проверки отдельных связей |
134
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135
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0
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my( $SourceDir ) = _SourceByRelsPartName( $RelsPartName ); |
136
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0
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my @RelIDs; |
137
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0
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for my $RelNode ( $XPC->findnodes( '/opcr:Relationships/opcr:Relationship', |
138
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$RelsDoc )) { |
139
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140
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# У связей должен быть уникальный ID |
141
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142
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0
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my $RelID = $RelNode->getAttribute('Id'); |
143
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0
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0
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if( grep $RelID eq $_, @RelIDs ) { |
144
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0
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return "Duplicate Ids in Relationships part $RelsPartName ". |
145
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"(OPC M1.26 violation)"; |
146
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} |
147
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148
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0
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0
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my $TargetMode = $RelNode->getAttribute('TargetMode') || 'Internal'; |
149
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0
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0
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if( $TargetMode eq 'Internal' ) { |
150
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151
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# Части, связи с которыми описаны, должны существовать |
152
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153
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0
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my $RelatedPartName = OPC::FullPartNameFromRelative( |
154
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$RelNode->getAttribute('Target'), $SourceDir ); |
155
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156
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0
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0
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unless( grep $RelatedPartName eq $_, @ValidPartNames ) { |
157
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0
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return "$RelsPartName contains reference on unexisting part $RelatedPartName"; |
158
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} |
159
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160
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# Не должно быть связей с другими Relationships частями [M1.25] |
161
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162
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0
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0
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if( grep $RelatedPartName eq $_, @RelsPartNames ) { |
163
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0
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return "Relationship part $RelsPartName contains reference on another ". |
164
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"Relationships part $RelatedPartName (OPC M1.25 violation)"; |
165
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} |
166
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167
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0
|
0
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push @PartNames, $RelatedPartName |
168
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unless grep $RelatedPartName eq $_, @PartNames; |
169
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} |
170
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} |
171
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172
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0
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0
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if( $RelsPartName eq "/_rels/.rels" ) { |
173
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0
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$PackageRelsDoc = $RelsDoc; |
174
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} |
175
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} |
176
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177
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# Общие для всех частей проверки |
178
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179
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0
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for my $PartName ( @PartNames ) { |
180
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181
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# У всех частей должен быть задан Content type [M1.2], хотя он может быть |
182
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# пустым [M1.14] |
183
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184
|
0
|
0
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|
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|
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unless( defined $Package->PartContentType( $PartName )) { |
185
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0
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return "Content type is not provided for $PartName (OPC M1.2 violation)"; |
186
|
|
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} |
187
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} |
188
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189
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# Обязательно должна быть часть, описывающая связи пакета (/_rels/.rels) |
190
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191
|
0
|
0
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|
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unless( $PackageRelsDoc ) { |
192
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0
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|
return "Can't find package relationships item (/_rels/.rels)"; |
193
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|
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} |
194
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|
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195
|
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|
|
# В пакете может присутствовать максимум одна часть, описывающей мета данные |
196
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|
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|
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|
|
# (Core Properties) [M4.1] |
197
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|
|
|
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|
198
|
0
|
|
|
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|
|
my @CorePropRelations = $XPC->findnodes( |
199
|
|
|
|
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|
|
'/opcr:Relationships/opcr:Relationship[@Type="'.RELATION_TYPE_CORE_PROPERTIES.'"]', |
200
|
|
|
|
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|
|
$PackageRelsDoc ); |
201
|
|
|
|
|
|
|
|
202
|
0
|
0
|
|
|
|
|
if( @CorePropRelations > 1 ) { |
203
|
0
|
|
|
|
|
|
return "Found more than one part with type 'Core Properties' (OPC M4.1 violation)"; |
204
|
|
|
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} |
205
|
|
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|
206
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|
|
# Если такая часть есть - проверка XML валидности, соответствия схеме и content type |
207
|
|
|
|
|
|
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|
208
|
0
|
0
|
|
|
|
|
if( @CorePropRelations ) { |
209
|
0
|
|
|
|
|
|
my $CorePropPartName = OPC::FullPartNameFromRelative( |
210
|
|
|
|
|
|
|
$CorePropRelations[0]->getAttribute('Target'), '/' ); |
211
|
0
|
|
|
|
|
|
my $CorePropXML = $Package->PartContents( $CorePropPartName ); |
212
|
0
|
|
|
|
|
|
my $CorePropSchema = XML::LibXML::Schema->new( location => |
213
|
|
|
|
|
|
|
"$XSD_DIR/opc-coreProperties.xsd" ); |
214
|
0
|
|
|
|
|
|
eval { |
215
|
0
|
|
|
|
|
|
my $CorePropDoc = XML::LibXML->new()->parse_string( $CorePropXML ); |
216
|
0
|
|
|
|
|
|
$CorePropSchema->validate( $CorePropDoc ); |
217
|
|
|
|
|
|
|
}; |
218
|
0
|
0
|
|
|
|
|
if( $@ ) { |
219
|
0
|
|
|
|
|
|
return $CorePropPartName." is not a valid XML or is not valid against ". |
220
|
|
|
|
|
|
|
"opc-coreProperties.xsd:\n$@"; |
221
|
|
|
|
|
|
|
} |
222
|
|
|
|
|
|
|
|
223
|
0
|
0
|
|
|
|
|
unless( $Package->PartContentType( $CorePropPartName ) eq CORE_PROPERTIES_CT ) { |
224
|
0
|
|
|
|
|
|
return "Wrong content type for $CorePropPartName" |
225
|
|
|
|
|
|
|
} |
226
|
|
|
|
|
|
|
} |
227
|
|
|
|
|
|
|
|
228
|
|
|
|
|
|
|
# В пакете должна быть как минимум одна часть, описывающая заголовок книги |
229
|
|
|
|
|
|
|
|
230
|
0
|
|
|
|
|
|
my @DescrRelationNodes = $XPC->findnodes( |
231
|
|
|
|
|
|
|
'/opcr:Relationships/opcr:Relationship[@Type="'.RELATION_TYPE_FB3_BOOK.'"]', |
232
|
|
|
|
|
|
|
$PackageRelsDoc ); |
233
|
|
|
|
|
|
|
|
234
|
0
|
0
|
|
|
|
|
unless( @DescrRelationNodes ) { |
235
|
0
|
|
|
|
|
|
return "FB3 description not found"; |
236
|
|
|
|
|
|
|
} |
237
|
|
|
|
|
|
|
|
238
|
0
|
|
|
|
|
|
for my $DescrRelationNode ( @DescrRelationNodes ) { |
239
|
|
|
|
|
|
|
|
240
|
|
|
|
|
|
|
# Каждую часть с описанием проверяем на валидность и соответствие схеме |
241
|
|
|
|
|
|
|
|
242
|
0
|
|
|
|
|
|
my $DescrPartName = OPC::FullPartNameFromRelative( |
243
|
|
|
|
|
|
|
$DescrRelationNode->getAttribute('Target'), '/' ); |
244
|
0
|
|
|
|
|
|
my $DescrXML = $Package->PartContents( $DescrPartName ); |
245
|
0
|
|
|
|
|
|
my $DescrSchema = XML::LibXML::Schema->new( location => |
246
|
|
|
|
|
|
|
"$XSD_DIR/fb3_descr.xsd" ); |
247
|
0
|
|
|
|
|
|
my $DescrDoc; |
248
|
0
|
|
|
|
|
|
eval { |
249
|
0
|
|
|
|
|
|
$DescrDoc = XML::LibXML->new()->parse_string( $DescrXML ); |
250
|
0
|
|
|
|
|
|
$DescrSchema->validate( $DescrDoc ); |
251
|
|
|
|
|
|
|
}; |
252
|
0
|
0
|
|
|
|
|
if( $@ ) { |
253
|
0
|
|
|
|
|
|
return $DescrPartName." is not a valid XML or is not valid against ". |
254
|
|
|
|
|
|
|
"fb3_descr.xsd:\n$@"; |
255
|
|
|
|
|
|
|
} |
256
|
|
|
|
|
|
|
|
257
|
|
|
|
|
|
|
# Часть с описанием обязательно должна содержать в себе ссылку на тело книги |
258
|
|
|
|
|
|
|
|
259
|
0
|
|
|
|
|
|
$DescrPartName =~ /^(.*)\/([^\/]*)$/; |
260
|
0
|
|
|
|
|
|
my( $DescrDir, $DescrFileName ) = ( $1, $2 ); |
261
|
0
|
|
|
|
|
|
my $DescrRelsPartName = "$DescrDir/_rels/$DescrFileName.rels"; |
262
|
0
|
|
|
|
|
|
my $DescrRelsXML = $Package->PartContents( $DescrRelsPartName ); |
263
|
0
|
0
|
|
|
|
|
unless( $DescrRelsXML ) { |
264
|
0
|
|
|
|
|
|
return "Can't find relationships for book description $DescrPartName ". |
265
|
|
|
|
|
|
|
"(no $DescrRelsPartName)"; |
266
|
|
|
|
|
|
|
} |
267
|
0
|
|
|
|
|
|
my $DescrRelsDoc = XML::LibXML->new()->parse_string( $DescrRelsXML ); |
268
|
0
|
|
|
|
|
|
my $BodyRelation = $XPC->findvalue( |
269
|
|
|
|
|
|
|
'/opcr:Relationships/opcr:Relationship[@Type="'.RELATION_TYPE_FB3_BODY.'"]/@Target', |
270
|
|
|
|
|
|
|
$DescrRelsDoc, |
271
|
|
|
|
|
|
|
); |
272
|
0
|
0
|
|
|
|
|
unless( $BodyRelation ) { |
273
|
0
|
|
|
|
|
|
return "Can't find body relationship for $DescrPartName"; |
274
|
|
|
|
|
|
|
} |
275
|
0
|
|
|
|
|
|
my $BodyPartName = OPC::FullPartNameFromRelative( $BodyRelation, |
276
|
|
|
|
|
|
|
$DescrDir ); |
277
|
|
|
|
|
|
|
|
278
|
|
|
|
|
|
|
# Найденную часть с телом книги также проверяем на валидность и соответствие схеме |
279
|
|
|
|
|
|
|
|
280
|
0
|
|
|
|
|
|
my $BodyXML = $Package->PartContents( $BodyPartName ); |
281
|
0
|
|
|
|
|
|
my $BodySchema = XML::LibXML::Schema->new( location => |
282
|
|
|
|
|
|
|
"$XSD_DIR/fb3_body.xsd" ); |
283
|
0
|
|
|
|
|
|
my $BodyDoc; |
284
|
0
|
|
|
|
|
|
eval { |
285
|
0
|
|
|
|
|
|
$BodyDoc = XML::LibXML->new()->parse_string( $BodyXML ); |
286
|
0
|
|
|
|
|
|
$BodySchema->validate( $BodyDoc ); |
287
|
|
|
|
|
|
|
}; |
288
|
0
|
0
|
|
|
|
|
if( $@ ) { |
289
|
0
|
|
|
|
|
|
return $BodyPartName." is not a valid XML or is not valid against ". |
290
|
|
|
|
|
|
|
"fb3_body.xsd:\n$@"; |
291
|
|
|
|
|
|
|
} |
292
|
|
|
|
|
|
|
} |
293
|
|
|
|
|
|
|
|
294
|
0
|
|
|
|
|
|
return ''; # успешный выход |
295
|
|
|
|
|
|
|
} |
296
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
sub IsValidPartName { |
298
|
0
|
|
|
0
|
0
|
|
my $PartName = shift; |
299
|
|
|
|
|
|
|
|
300
|
|
|
|
|
|
|
# "A part URI shall not have a forward slash as the last character. [M1.5]" |
301
|
0
|
0
|
|
|
|
|
return 0 if $PartName =~ /\/$/; |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
# Проверяем отдельные сегменты имени |
304
|
0
|
|
|
|
|
|
for my $NameSegment ( split '/', $PartName ) { |
305
|
|
|
|
|
|
|
|
306
|
|
|
|
|
|
|
# "A segment shall not contain percent-encoded forward slash (“/”), or backward |
307
|
|
|
|
|
|
|
# slash (“\”) characters. [M1.7]" |
308
|
|
|
|
|
|
|
# "A segment shall not contain percent-encoded unreserved characters. [M1.8]" |
309
|
0
|
|
|
|
|
|
for my $Char (( '/', '\\', 'a'..'z', 0..9, '-', '.', '_', '~' )) { |
310
|
0
|
|
|
|
|
|
my $PercentEncodedChar = sprintf( '%%%x', ord( $Char )); |
311
|
0
|
0
|
|
|
|
|
return 0 if $NameSegment =~ /$PercentEncodedChar/i; |
312
|
|
|
|
|
|
|
} |
313
|
|
|
|
|
|
|
|
314
|
|
|
|
|
|
|
# "A segment shall not end with a dot (“.”) character. [M1.9]" |
315
|
0
|
0
|
|
|
|
|
return 0 if $NameSegment =~ /\.$/; |
316
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
# "A segment shall include at least one non-dot character. [M1.10]" |
318
|
|
|
|
|
|
|
# (избыточное условие, удовлетворяющееся с помощью M1.9) |
319
|
|
|
|
|
|
|
} |
320
|
|
|
|
|
|
|
|
321
|
0
|
|
|
|
|
|
return 1; |
322
|
|
|
|
|
|
|
} |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
sub _SourceByRelsPartName { |
325
|
0
|
|
|
0
|
|
|
my $RelsPartName = shift; |
326
|
|
|
|
|
|
|
|
327
|
0
|
|
|
|
|
|
my( $SourceDir, $SourceFileName ) = ( $RelsPartName =~ / |
328
|
|
|
|
|
|
|
^ ( .* ) # папка файла источника |
329
|
|
|
|
|
|
|
_rels\/ |
330
|
|
|
|
|
|
|
([^\/]*) # название файла источника без папки |
331
|
|
|
|
|
|
|
.rels /x ); |
332
|
|
|
|
|
|
|
|
333
|
0
|
|
|
|
|
|
return ( $SourceDir, $SourceFileName ); |
334
|
|
|
|
|
|
|
} |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
1; |